Rotary eccentric-piston pump.



PATENTED APR. 28, 1903,

M. LIMNELL. ROTARY BGCENTRIG PISTON P MP;

APPLICATION FILED DEC. 31, 1902.

H0 MODEL.

1 26 ma/Mm: 06 ,l 2Q

.ll l|||||| I ll.

NITED STATES 'PATENT QFFICE.

MIKE,LIMNELL, OF SUPERIOR, W'ISCONSIN.

ROTARY ECC'ENTRIC-PISTON PUMP.

SPECIFICATION forming part of Letters Patent No. 726,712, dated April28, 1903.

Application filed December 31, 1902. Serial No. 137,273. (No model.)

To all whom it may concern:

Be it known that I, MIKE LIMNELL, a subject of the Czar of Russia,(buthaving declared my intention of becoming a citizen of the UnitedStates,) residing at Superior, county of Douglas, and State ofWisconsin, have invented certain new and useful Improvements in RotaryEccentric-PistonPumps, of which the following is a specification.

My invention relates to pumps of the eccentric-piston and slidingabutment or gate type.

The object of the present invention is the provision of a pump whichwill be of simple construction and strong and durable, will requirelittle power to operate the same,which will have large suction and forcepower and have a continuous discharge, and which can be reversed andalso operated noiselessly in practically any position.

A further object of the invention is the provision of an improved andnovel connection between the sliding gate or abutment and the eccentricpiston, whereby they will cooperate smoothly and perfectly and in awatertight manner without danger of any disconnection, jarring, or otherobjectionable manner of work.

vide a pump of improved and novel construction, as will appear morefully from the fol lowing description, while the novel features will berecited in the appended claims.

In the accompanying drawings, Figure 1 is a side elevation with certainparts of the casing in section. Fig. 2 is an end view, partly insection. Fig. 3 isa plan view; Fig. 4, details of the eccentric piston,and Fig. 5 details of the sliding abutment and connection between it andthe piston.

The numeral 1 designates the casing,which is preferably cast in 'twomain parts-the body and the removable cap-plates 2, the body having thehub-bearing 3 and the capplate having the hub 4, into which is screwedthe stuffing-box 5. The casing has a suitable base 6 and is provided atits top with a guidebox 7 and force and suction couplings 8 and 9. Atthe bottom of the casing is a drainplug 10.

The numeral 11 designates a shaft which To accomplish the foregoingobjects, I procarries a packing member or plate 14, which bears againstthe interior of the casing and has a shank l5, movable in a radialopening 16 in the piston and pressed by a coil-spring 17. This gives atight fit between the piston and the casing at all times and preventsany leakage. The opposite sides of the piston are circularly countersunkat 18 and 19, thus providing grooves or depressions for thereception ofthe springs on the-gate or movable abutment.

The gate-or movable abutment 20 slides vertically in the gate-box 7,which snugly yet easily receives and guides it, and this gate is of thesame width as the interior of the gatebox and casing, and it is providedwith '2. preferably integral arm 21 at one edge and a detachable arm 22at its other edge, the space between which is just the width of thepiston 13, and these arms straddle the piston and bear against oppositesides thereof, the lower edge 23 of ,the gate being rounded or curvedwhere it rests against the periphery of the piston to prevent anyinterruption of the movement of thepiston or any jar or shock When themember 14. comes in contact with the edge 23 of the gate 20. To preventanyjumping action of the gate and to insure a water-tight fit between itand the piston and generally a smooth cooperation between the piston andthe gate, I provide leaf-springs 24 and 25, which are in all respectssimilar in construction. These springs are formed on a slight arch andof slightly less width than the depth of the countersinks 18 and 19 thearms 21 and 22 of the movable gate or abutment 20, it being understoodthat the springs are rigidly connected to the trunnions or pivots 27.Thus as the piston rotates the springs can turn slightly with theirpivots to compensate for any inequalities of action rear-i2 which mightbe due to the pressure or operation of the pump, and the springsconstantly exercise a pressure on the rims 26 and keep the edge 23 ofthe gate held against the periphery of the piston. It will be seen thatregardless of the direction of rotation of the piston or its speed theimproved connection between the sliding gate or abutment and the pistonis such that there is a perfect cooperation, which insures smoothrunning at all times and prevents any leakage.

I am aware that changes of construction could be resorted to in carryingout my invention, and I lay claim, therefore, to all modificationsfalling within the spirit and scope of the invention.

Having thus described my invention, what Iclaim as new, and desire tosecure by Letters Patent, is

1. In apump, the combination with a pumpcasing having induction andeduction ports, of a rotary piston in the casing, a gate or abutmentslidable in the casing, and a spring connection interposed between thegate and piston. and positively connecting them and adapted to maintainthe gate or abutmentin cooperation with the piston.

2. In a pump, the combination with a casing having induction andeduction ports, of a rotary piston in the casing, a spring-pressedpacking carried by the piston and operating against the casing, amovable gate or abutment in the casing, and a spring connectioninterposed between the gate and the piston and positively connectingthem which permits the passage of the packing by the gate without shock.

3. In a pump, the combination with a casing having induction andeduction ports, of a rotary piston in the casing, a gate movable in thecasingand adapted to bear against the periphery of the piston, andsprings carried by the gate and bearing against the piston for holdingthe gate ahutted against the piston.

4c. In a pump, the combination with a casing having induction andeduction ports, of a rotary piston in the casing, a movable gate in thecasing which has armsstraddling the piston, and springs carried by thearms and bearing against the piston which maintain the gate in contactwith the piston.

5. In a pump, the combination with a casing having induction andeduction ports, of a piston rotatable in the casing, a movable gateadapted to bear against the periphery of the piston, and leaf springscarried by the gate and bearing against the piston which insure theabutment of the gate and piston.

o. In a pump, the combination with a casing having induction andeduction ports, of a rotary piston in the casing, a movable gate bearingagainst the periphery of the piston, and leaf-springs bearing on thepiston which are journaled or pivoted to the gate, said springs insuringthe engagement of the piston and gate.

7. In a pump, the combination with a casing having induction andeduction ports, of a rotary piston in the casing, said piston havingcountersinks in its sides, of a movable gate or abutment, and springscarried by the gate or abutment and located in the countersinks andbearing against the piston and maintaining engagement of the gate andpiston.

S. In a pump, the combination with a casing having induction andeduction ports, of a rotary pistonin the casing, said piston havingcountersinks in its sides which provide the piston with a rim, a movablegate having arms straddling the piston, and leaf-springs carried by saidarms, said springs being received in the counter-sinks and bearingagainst the rim of the piston and maintaining the engagement of thepiston and gate.

9. In a pump, the combination with a casing having induction andeduction ports, of a rotary piston in the casing, said piston havingcountersinks in its sides which provide a rim, a movable gate orabutment having arms which straddle the piston, a portion intermediatethe arms which abuts the periphery of the piston, and bowed leaf-springshaving trunnions pivoted to the arms, said leafsprings being located inthe-conntersinks and having their ends bearing against the rim of thepiston and maintaining the engagement of the piston and gate.

In testimony whereof I hereunto affix my signature in presence of twowitnesses.

MIKE LIMNELL.

\Vitnesses:

Gosr WEHVILAINER, JOHN FIsTnL.

